I haven't but I'm interested in the techniques of making one :).
Anyone ever create there own chess engine/computer
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Well if you ever was curious on how to make one first you should learn about C++ search it on google. You also have to know how to get the right parmetter set on the prototype and thats very important since raising everything could confuse the engine in actual play. Theres a bunch other stuff but first start bylooking at C++. Engines are great cause even if you dont think you'll become a IM or GM you can stilll be rembered in the chess world for age's if you created a powerful engine. Once your done look into test suites for the engine so you know which one you want ahead of time.
I worked with other people in my class as a little project so they know all that stuff. I'm mainly the guinne pig to play practice games but I do know what your talking about and yes they did start with that first. I had to put in the legal moves and parameters of the engine. You probably need to work on the parameters next 2.
O also the work on the engines evalutaions is most tricky do you know anything about it. the easiest is just imputting the piece values,
I've created 2 even though niether one are at 1100 stregth sadly. I also used Nagaski create a personality feature which is somewhere in the Class A range (I'm still testing)